On 9/25/07, Matt <[EMAIL PROTECTED]> wrote: > I'm running a RAID1 mirror on OpenBSD 4.1 (webserver) > On a power failure the parity becomes dirty and needs rewriting, which > results in > 1.5 hours 'downtime'. > Is it safe to background this in /etc/rc or is that a no-no? > > I found a reference this was possible/safe on-list but it was a) 2003 > and b) dealt with RAID5. > I'd like to make sure I am not doing something dangerous.
I frankly don't know enough to guarantee that this is safe, or not, but I had a RAID1 with big disks on an ancient machine that took about 26 hours to check parity (! -- this wasn't my idea), and I modified its rc to boot up, and then begin performing the parity check in the background. The only caveat I would give is that the operating system was installed and running on a 3rd, separate disk, and that network access to the mirrored drives was disabled until the parity rewrite was complete. - R.
